[Bug 257972] collating sequence not sensible in some locales

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=257972

--- Comment #7 from Yuri Pankov <yuripv@FreeBSD.org> ---
All I can say here is quote the following from
https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap09.html:
---
In the POSIX locale, a range expression represents the set of collating
elements that fall between two elements in the collation sequence, inclusive.
In other locales, a range expression has unspecified behavior: strictly
conforming applications shall not rely on whether the range expression is
valid, or on the set of collating elements matched.
---
So my take on this is "don't use range expressions".

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